TY  - RPRT
TI  - Letter: Aetiology of patent ductus arteriosus.
AU  - H Ochs
AU  - A Schaede
PY  - 1975
DO  - 10.1016/s0140-6736(75)91805-x
UR  - https://pubmed.ncbi.nlm.nih.gov/47124/
ID  - 47124
ER  -